[Snyk] Security upgrade org.postgresql:postgresql from 42.6.0 to 42.7.2

[robfrank]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `maven` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • pom.xml

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	736/1000 Why? Recently disclosed, Has a fix available, CVSS 9	SQL Injection SNYK-JAVA-ORGPOSTGRESQL-6252740	org.postgresql:postgresql: 42.6.0 -> 42.7.2	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Check the changes in this PR to ensure they won't cause issues with your project.

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